Roofing composition



Dec.A 15,A 1942.A Q HQWARD 2,305,008

ROOFINGColvIPosITIoN` Filed Deo. 11, 1940 IN VEN TOR.`

f//s ATTO Patented Dec. 15, 1942 `UNITED STATES PATENT OFFICE ROOFIN GCOMPOSITION 'Orlie Howard, Gibson City, Ill.

Application December 11, 1940, Serial No. `369,547

(Cl. 10S-7) 6 Claims.

This invention relates to roofing construction and it is one of theprincipal objects of this invention to provide a roofing compositionwhich will be simple in construction, highly eillcient in use andeconomical in manufacture.

It is another object of the present invention to provide a roofingconstruction with lap joints with the flanges of the roofing materialreinforced by metal strips.

Another object of the invention is the provision of a roofingcomposition comprising units having flange portions provided with alight gauge metal strip embedded therein to reinforce the flange portionand rigidify the lap joints resulting from an interlocking relationshipwith the flange portions of adjoining units.

A further object of the present invention is the 4provision in roofingconstruction of flange portions which will interlock and overlap withlike flange portions of adjacent units with the flange portions providedwith metal strips adhered thereto to reinforce the crease lines at theflanges and rigidify the resulting lap joints provided by twointerlocking units.

A still further object of the invention is to provide La dry lap jointin roofing construction which will provide a tight seal and assureagainst seepage of heavy rains and like weather elements.

It is a still further object of the invention to provide a roofingconstruction with lap joints having a relatively rigid reinforcingmember formed therewith to provide a solid seam which will withstand thestresses of heavy winds to assure against any removal of the roongmaterial by reason of wind pressure and the like.

Other objects of this invention will appear more .fully as thedescription proceeds in view `of the drawing in which:

Fig. 1 is a fragmentary perspective view of a roof covered with roofingcomposition embodying my present invention;

Fig. 2 is a fragmentary perspective view illustrating one form ofroofing units with which my present invention is adapted to beassociated;

Fig. 3 is a fragmentary perspective View of a joint resulting from themodified form of my construction, illustrated in Fig. 5, to enlargedscale.

Referring to the drawing, IU indicates a unit of roofing compositionwhich is provided with flanges I I adapted to be bent back upon the unitalong crease lines I2. Each of the units IIJ is adapted tointerlock withadjacent units as illustrated in Fig. 2 by folding the body flanges I Iupon each other to provide a lap joint I3.

The preferred form of my invention is best illustrated in Figs. 3 and 4wherein there is shown a body I4 of roofing material comprising two plysI5 and I6 of the conventional composition roofing material. At theflange portions II there is provided a light gauge metal strip I'I whichis formed with a crease I2 corresponding to the crease I2 in the roofingmaterial I4. This metal strip comprises two portions I 8 and I9 dividedby the crease I2', each of which portions are equal in width so that theportion I8 will span the width of the flange II while the portion I9will extend into the body I4 a distance substantially equal to the widthof the flange II. This metal strip is embedded in the body I4 when theroofing material is manufactured and is so positioned with respect tothe body as to form a part thereof.

Each of the portions I8 and I9 are provided with perforations 2li whichare adapted to align with each other when the flange I I is bent backupon the body I4. When two adjacent units I0 are joined the flangeportion II of each unit is adapted to t into the U-shaped lap providedby the flange II of the adjacent unit of the corresponding section ofthe body I4 thereof. This is best illustrated in Fig. 4 wherein theperforations 28 of each of the sections I8 and I9 of corresponding metalstrips are shown in alignment to provide a passage for a fastening means2! in the form of roofing nails or the like.

It is to be particularly pointed out that when the lap joint 22,illustrated in Fig. 4, is formed there is no cement or other adhesivecoating ap-` plied to the interlocking flanges II and that by reason ofthe relative rigidity of the metal strip Il there is a uniformdistribution of the binding effect provided by the head 2| of the nails2| along the lap joint. This uniformity of bond results in a tight sea-mthroughout the length of the lap joint 22 `to prevent the seepage ofdampnessor water into and underneath the roofing units I0.

It is further pointed out that as seen in the cross sectional view, Fig.4 the reinforcing effect resulting from the metal strip embedded alongthe adjoining edges of adjacent units, the binding force of the head 2|'of the nails is also distributed transversely of the joint 22 therebyassuring that the free end 23 of the joint will at all times be held inclose proximity to the underlying roong unit I0 adjacent thefreto. Byreason of the rigidifying effect that the metal strip has upon the lapjoint the top fold terminating at the edge 23 is not pliable to the sameextent as ordinary lap joints Without metal reinforcing and by reasonthereof this upper extending fold terminating at 23 will not be readilymoved by wind stress but rather will withstand the forces of windsagainst a lifting action at the lap joints.

In the modified form, illustrated in Figs. 5 andv 6, I have shown a body25 comprising' a single layer of roofing material which khas adheredthereto a metal strip l1 identical to the strip illustrated in Figs. 3and 4. This metal strip is adhered to and pressed into engagement withthe roong material 25 so as to form a part thereof thus providing afinished product with a reinforced edge portion ready for appliance uponroofs to be covered. As seen in Fig. 6 this modifled form provides a lapjoint 26 identical to that shown in Fig. 4 with the lexception thatthere is but a single layer of roofing composition adjacent each layerof metal reinforcing. The lap joint provided by this form has all thebenets and attributes of the preferred form and like the'latter willprovide a durable interlocking seal at the interconnecting joints of theadjoining units. v

lWhile I have illustrated and described the preferred form ofconstruction for carryingY my invention into effect, this is capable ofvariation vand modification without departing from the said edge flangesbeing bent back upon the body f, E

in U shape with abutting edge flanges bent alternately under and overtheir respective body and interlocking with each other, means forfastening said edge flanges to a surface to be covered, the

combination with said edge portion of a metallic f sheet embedded insaid body along said edge portions to reinforce the latter and to coactwith the fastening means to provide a seal throughout the interlockededges.

2. In lap joints for roofing material comprising a flexible surfacesheet having an edge portion folded back upon itself to provide a U-shaped flange portion, one U shaped flange portion being formed aboveand the other below its respective surface sheet and with the edgeportion of each sheet arranged in interlocking relation with a like edgeportion on an adjacent sheet, a metallic sheet embedded in said flangeportion and extending partially into said surface sheet to reinforce thefold aforesaid and to rigidify the interlocking edge portions when thelatter are nailed down upon the surface covered.

3. In a rooilng composition, the provision of a plurality of base sheetshaving crease lines along their edges to form flange portions, metalstrips bridging the crease lines and extending into the base sheet adistance substantially equal to the width of said flange portions, saidflange portions being bent back upon their respective base sheets andarranged between the flange portion and body of an adjacent sheet toprovide an interlocking relationship between the metal strips, saidinterlocking metal strips coacting to reinforce the connection betweenadjacent base sheets and affecting a uniform seal therebetween.

4. In a roofing composition, the provision of a plurality of base sheetseach having crease lines along their edges to form flange portions,metal strips bridging the crease lines and extending into the base sheeta distance substantially equal to the Width of said flange portions,said flange portions being bent back upon their base sheets to form Ushaped edges, the flange portion of each base sheet being disposedwithin the U shaped edge of the adjacent base sheet to interlock themetal strips thereof, said metal strips having perforations formedtherein, and fastening means extending through said flange portions andperforations to afxrsaid roofing composition on a surface to be covered.

5. In a roofing composition, the provision of a plurality of base sheetshaving crease lines adjacent their edges to form flange portions, metalstrips adhered to said base sheets and bridging d the crease lines andextending into the width of said flange portions, said flange portionsand metal strips being bent back upon their respective base sheet alongsaid creased line to provide U shaped edges, the U shaped edge ofadjacent sheets being alternately above on one sheet and below on theother with the flange portion of the upper sheet disposed in theconfines of the lower U shaped edge and the flange portion of the lowersheet disposed within the confines of the upper U shaped edge, headedfasteningmeans extending through said flange portions, said metal stripscoacting with each other and said heated fastening means to provide auniformly 'interlocked seal.

6. In a roof-lng composition comprising a base sheet formed to providean interlocking lap joint with an adjacent base sheet, said lap jointincluding a flange portion on said base sheet, a metal strip lformedintegrally with said base vsheet and extending over said flange portionand into the base sheet a distance equal to the width of said flangeportion, said flange portion being bent back upon the base sheet andoverlying the flange portion of an adjacent base o sheet, said adjacentbase sheet being bent back` upon its flange portion to overlie saidflange` portion of the underlying base sheet, said metal strips coactingwith said flange portions to provide a ridged rib, perforations formedin said metal strips, said perforations of one metal strip aligning withthe perforations of the adjoining metal strip, and fastening meansarranged in aligned perforations for attaching said roofing compositionto the surface covered.

ORLIE HOWARD.

